ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) - Solomon Islands
type: Dataset
description: The ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator). The development of the ASTER GDEM data products is a collaborative effort between National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI). The ASTER GDEM data products are created by the Sensor Information Laboratory Corporation (SILC) in Tokyo. The ASTER GDEM Version 3 data product was created from the automated processing of the entire ASTER Level 1A archive of scenes acquired between March 1, 2000, and November 30, 2013. Stereo correlation was used to produce over one million individual scene based ASTER DEMs, to which cloud masking was applied. All cloud screened DEMs and non-cloud screened DEMs were stacked. Residual bad values and outliers were removed. In areas with limited data stacking, several existing reference DEMs were used to supplement ASTER data to correct for residual anomalies. Selected data were averaged to create final pixel values before partitioning the data into 1° by 1° tiles with a one pixel overlap. To correct elevation values of water body surfaces, the ASTER Global Water Bodies Database (ASTWBD) Version 1 data product was also generated. The geographic coverage of the ASTER GDEM extends from 83° North to 83° South. Each tile is distributed in GeoTIFF format and projected on the 1984 World Geodetic System (WGS84)/1996 Earth Gravitational Model (EGM96) geoid. Each of the 22,912 tiles in the collection contain at least 0.01% land area.
language: en-US
date created: 08-06-2021T05:06:26.0
date modified: 15-02-2022T03:02:23.0
publisher: Secretariat of the Pacific Regional Environment Programme
subject of: Land
subject of: Inland Waters
keywords: geo
keywords: gis
keywords: data
keywords: conservation
keywords: biopama2
keywords: elevation
keywords: hillshade
keywords: gdem
keywords: aster
keywords: gtm
keywords: dem
license: https://pacific-data.sprep.org/resource/public-data-license-agreement-0
author: Sensor Information Laboratory Corporation
spatial: POLYGON ((156.6478729248 -2.94646960413, 156.2084197998 -6.3623874204419, 155.0218963623 -7.1915071032122, 160.3832244873 -12.857996065883, 165.7006072998 -12.686564342819, 167.8978729248 -11.267979280905, 167.1068572998 -8.0191156680784, 159.1527557373 -3.5607093327886))
spatial coverage: Solomon Islands
accountable person: Sensor Information Laboratory Corporation
distribution: 1 arc-second Digital Elevation Model and Hillshade
  type: DataDownload
  file format: zip
  encoding format: application/zip
  content size: 88861006
  description: Resource contains raster files for a Digital Elevation Model (DEM) and derived hillshade for the Solomon Islands. The ASTER Global Digital Elevation Model (GDEM) Version 3 (ASTGTM) provides a global digital elevation model (DEM) of land areas on Earth at a spatial resolution of 1 arc second (approximately 30 meter horizontal posting at the equator). The development of the ASTER GDEM data products is a collaborative effort between National Aeronautics and Space Administration (NASA) and Japan’s Ministry of Economy, Trade, and Industry (METI). The ASTER GDEM data products are created by the Sensor Information Laboratory Corporation (SILC) in Tokyo. The ASTER GDEM Version 3 data product was created from the automated processing of the entire ASTER Level 1A archive of scenes acquired between March 1, 2000, and November 30, 2013. Stereo correlation was used to produce over one million individual scene based ASTER DEMs, to which cloud masking was applied. All cloud screened DEMs and non-cloud screened DEMs were stacked. Residual bad values and outliers were removed. In areas with limited data stacking, several existing reference DEMs were used to supplement ASTER data to correct for residual anomalies. Selected data were averaged to create final pixel values before partitioning the data into 1° by 1° tiles with a one pixel overlap. To correct elevation values of water body surfaces, the ASTER Global Water Bodies Database (ASTWBD) Version 1 data product was also generated. The geographic coverage of the ASTER GDEM extends from 83° North to 83° South. Each tile is distributed in GeoTIFF format and projected on the 1984 World Geodetic System (WGS84)/1996 Earth Gravitational Model (EGM96) geoid. Each of the 22,912 tiles in the collection contain at least 0.01% land area.